<!DOCTYPE html>
<html>
  <body>
    <fieldset>
      <legend style="width: 300px; min-width: 400px; max-width: 50px;
                     height: 300px; min-height: 400px; max-height: 50px;
                     border: 1px solid black;">
        <span style="display: inline-block; height:100px; width: 100px"></span>
      </legend>
    </fieldset>
  </body>
</html>
